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Solaris Tunable Parameters information sources and consideration, using a customer service request (SR) as a example (Doc ID 1522203.1)

Last updated on OCTOBER 05, 2022

Applies to:

Solaris Operating System - Version 8 6/00 U1 to 11.1 [Release 8.0 to 11.0]
Information in this document applies to any platform.


Oracle Solaris Tunable Parameters Reference Manual January 2013
Oracle Solaris 10 1/13 Information Library (this is the U11 version)

There is one version for each update release.

One of the central statements of this guide is:
"Remember that one system's /etc/system settings might not be applicable, either wholly or in part, to another system's environment. Carefully consider the values in the file with respect to the environment in which they will be applied. Make sure that you understand the behavior of a system before attempting to apply changes to the system variables that are described here."


Tunables for the Sun StorEdgeTM SAN Foundation Suite: Optimizing for Performance and Failover

Sun Microsystems, Inc.
Abstract: This article describes various tunables for Sun StorEdge™ SAN Foundation Suite (also known as Leadville) software, specifically for failover optimization and performance.

Caution: Tuning these parameters may cause adverse affect on the system. If you are optimizing your storage configuration for stability, we recommend staying with the default values for these tunables. Any changes to these tunables are made at your risk, and could have unexpected consequences (e.g., fatal I/O errors when attempting to perform online firmware upgrades to attached devices, or during ISL or other SAN reconfigurations). Changes could also affect system performance due to excessive path failover events in the presence of minor intermittent faults etc.


Some storage related parameters discussed in Doc ID 1510766.1.


This is a new install, in production for 2 weeks now customer copied the /etc/system file from another server with a older version of Sol 10.

Customer wants to know:

1 - if these parameters are still available in the Oracle Solaris 10 8/11 s10s_u10wos_17b SPARC OS version
2 - any info I could provide about these parameters

set ssd:ssd_max_throttle=32
set ip_squeue_soft_ring=1
set ip:ip_soft_rings_cnt=16
set fcp:fcp_offline_delay=20
set fcp:ssfcp_enable_auto_configuration=1


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